At AutoAnything, we understand that contractors put up with all kinds of difficult work conditions. A tonneau cover is necessary at times, but so is quick access to the tools in your truck bed tool box. Get security and quick tool box access with a GMC 2011 Sierra tool box tonneau cover.

BAK BAKFlip F1 Tonneau Cover with BAKBox 2 Toolbox Reviews

Very well made,and easy to install.
I watched the you tube video, then pretty much put the hole thing together without the directions.
Looks, and fits great.
The only complaint i have is the price,but its well worth it.

BAK BAKFlip HD Tonneau Cover with BAKBox 2 Toolbox Reviews

The fit and finish of the BAKFlip HD couldn't be better. The tool box is about what you'd expect; it's not the most spacious option so if you need to carry a decent amount of tools it's not the box for you. However, I personally like the ability to empty out the box and regain the majority of the space in my shortbed when I need it.